超声波回波测距
ultrasonic wave echo measuring distance
短脉波声波回迹鉴定技术
acoustic short-pulse echo classification technique {ASRAPS
多普勒雷达回波
Doppler radar echoes
Doppler radar echo
Doppler weather radar echo
dopplar weather radar
多普勒雷达回波特征
Doppler rada echo characteristic
Radar echo
多普勒天气雷达回波
Doppler weather radar echo
飞行雷达回波
aircraft interphone system
飞行物雷达回波
aircraft interphone system